What does that mean, "It won't let me"?
To edit your email address goto your "View profile" link, (top right of the browser window), then click on the "Edit my account" option. You then have to log in using your old username, (old email address), and password, and this will take you to the "Manage your account" screen where you can amend your email address.
What part of this process doesn't work for you, and what error messages do you get?
Mark
when got new email i tried to enter my old and it wont let me
can i get any help?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic